South Korea's Incheon International Airport has once again been selected as the best airport in the world.

The airport received the honor for six consecutive years in the annual Airport Service Quality survey by the Airports Council International, or the ACI. The award ceremony was held in New Delhi on Thursday night local time.

The ACI annually announces its airport ranking based on the results of one-on-one interviews with some 250-thousand airport users around the world on the customer satisfaction with and the quality of service at major airports.